HYDRA-809: Add Unit Test for Isolate Select for Maya data (#78)

* Add unit test for Isolate Select for Maya items

* remove unwanted dependency

test/lib/mayaUsd/render/mayaToHydra/CMakeLists.txt

@@ -15,6 +15,7 @@ set(INTERACTIVE_TEST_SCRIPT_FILES
     testMaterialXOnNative.py
     testNewSceneWithStage.py
     testMayaDisplayModes.py
+    testMayaIsolateSelect.py
     testMayaLights.py
     testUSDLights.py
     testArnoldLights.py

test/lib/mayaUsd/render/mayaToHydra/testMayaIsolateSelect.py

@@ -0,0 +1,60 @@
+#
+# Copyright 2024 Autodesk, Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+import maya.cmds as cmds
+import fixturesUtils
+import mtohUtils
+
+import platform
+
+class TestMayaIsolateSelect(mtohUtils.MtohTestCase): #Subclassing mtohUtils.MtohTestCase to be able to call self.assertSnapshotClose
+    # MayaHydraBaseTestCase.setUpClass requirement.
+    _file = __file__
+
+    @property
+    def imageDiffFailThreshold(self):
+        # HYDRA-837 : Wireframes seem to have a slightly different color on macOS. We'll increase the thresholds
+        # for that platform specifically for now, so we can still catch issues on other platforms.
+        if platform.system() == "Darwin":
+            return 0.1
+        return 0.01
+
+    @property
+    def imageDiffFailPercent(self):
+        # HYDRA-837 : Wireframes seem to have a slightly different color on macOS. We'll increase the thresholds
+        # for that platform specifically for now, so we can still catch issues on other platforms.
+        if platform.system() == "Darwin":
+            return 4
+        return 0.2
+
+    def test_IsolateSelect(self):
+
+        sphere = cmds.sphere( n='sphere1' )
+        cone = cmds.cone( n='cone1' )
+        cmds.move( 1, 5, 1 )
+        self.assertSnapshotClose("default" + ".png", self.imageDiffFailThreshold, self.imageDiffFailPercent)
+
+        # Use the current modelPanel for isolation
+        isolated_panel = cmds.paneLayout('viewPanes', q=True, pane1=True)  
+        # locks the current list of objects within the mainConnection
+        cmds.editor( isolated_panel, edit=True, lockMainConnection=True, mainListConnection='activeList' )
+
+        cmds.select(sphere)
+        cmds.isolateSelect( isolated_panel, state=1 )
+        self.assertSnapshotClose("isolateSelect" + ".png", self.imageDiffFailThreshold, self.imageDiffFailPercent)
+
+if __name__ == '__main__':
+    fixturesUtils.runTests(globals())